A Little about nuclease-associated modular DNA-binding domains - NUMODs
We have identified four new types of short conserved sequence domains in homing endonucleases and related proteins. These domains are modular, appearing in various combinations. One domain includes a motif known by structure as a novel sequence-specific DNA-binding helix. Sequence similarity shows two other domains to be new types of HTH DNA-binding domains. We term the new domains nuclease-associated modular DNA-binding domains (NUMODs).
We have published these domains see: "Sitbon,E.&Pietrokovski,S.(2003).New types of conserved sequence domains in DNA-bindin regions of homing endonucleases.Trends Biochem.
Sci.28,473-477".
A preprint of this paper.
These multiple sequence alignments have been deposited with the European Bioinformatics
Institute (fttp:/ftp.ebi.ac.uk/pub/databases/embl/align) with accession numbers: NUMOD1, ALIGN_000570; NUMOD2, ALIGN_000571; NUMOD4a, ALIGN_000574; NUMOD4b, ALIGN_000575; NUMOD4c, ALIGN_000576. NUMOD1, NUMOD3, and NUMOD4, can be found in InterPro as well.
The I-TevI protein contains NUMOD3 in its DNA binding region. The structure of the DNA binding region was previously determined (Van Roey, P. et al. (2001) Embo J 20, 3631-7.). In the following page you can find figures of I-TevI (pdb code 1i3j) with NUMOD3 highlighted.
Latly, NUMOD4 (A,B and C) were identified as DNA binding motifs by:
Betty W. Shen, Markus Landthaler,David A. Shub and Barry L. Stoddard
as published in" (2004) DNA Binding and Cleavage by the HNH Homing Endonuclease I-HmuI JMB 342(1).43-56 "
See link